SusChemE 2015
International Conference on Sustainable Chemistry & Engineering
October 8-9, 2015, Hotel Lalit, Mumbai
Adsorptive removal of Methylene Blue dye using Montmorillonite K10 Supported N doped
TiO2
Prachi D. Dwidmuthe1, S. Mayadevi2, J. K. Kim3, L. C. Campos3, L. Ceric 3, J. B. Naik1, S. K. Sonar2
1
Chemical Engineering Department, University Institute of Chemical Technology, NMU, Jalgaon
CEPD Division, CSIR-National Chemical Laboratory, Pune
3
Dept of Civil, Environmental and Geomatic Engineering, University College London, U.K.
2
Email
address:
prachidwidmuthe@gmail.com,
s.mayadevi@ncl.res.in,
l.ciric@ucl.ac.uk; jitunaik@gmail.com, shilpasonar01@gmail.com
j.k.kim@ucl.ac.uk,
l.campos@ucl.ac.uk,
1. Introduction:
Dyes are used in many industries such as textile, paper, plastic, for coloring their final product. The release of colored water
from industries affects the human food chain [1]. Common dye disposal methods include precipitation, adsorption,
biodegradation, photo-catalytic and advanced oxidative degradation. Considerable interest has been focused on using adsorption
technique for the removal of dyes from solutions on various adsorbents such as clays, fly ash, peat, activated carbon [2]. In the
present work, titanium is doped with Nitrogen to enhance its activity. Montmorillonite K10 (MMT K10) is then used as a
support to increase the surface area [4]. This material can act as a very good adsorbent for Methylene blue(MB).
2. Materials and Method:
Chemicals used were Titanium Butoxide (C16H36O4Ti, SDFCL Chemicals), urea (98%,Thomas Baker), absolute ethanol (99.7
%, Thomas Baker), MMT K10 ((Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O, FlukaChemica), Nitric Acid (67.7 %, Thomas Baker),
MB (SCl,ThomasBaker),
2.1 Method: Adsorbent was synthesized by a sol–gel process. Ti(OBu)4 and ethanol was mixed and stirred for 30 min. To this
HNO3 was added and stirred for 45min (sol. A). The mixture containing urea, ethanol and water was added drop-wise to sol. A.
Montmorillonite (MMT) K10 was added to this and stirred till gel was formed. The gel was aged for 24 h, dried at 60oC for 12
h and finally ground and calcined for 5h at 5000C to get the adsorbent.
3. Results and Discussion:
Samples were analyzed by BET, XRD, XPS, SEM, Raman and UV-Vis spectroscopy etc. Among these characterization results
of XRD are presented as follows:
3.1 X-Ray diffraction:
XRD patterns of the synthesized adsorbents and K10 and the adsorbents are presented in Fig. 1. The figure shows that most
1
Fig. 1: XRD pattern of samples, MMT K10 and standard XRD
of the peaks are of anatase phase and some are of rutile phase. The intensity of the peaks of N-TiO2 is slightly weaker compared
to undoped TiO2.
3.2 Adsorption Studies of MMT K10 Supported N doped TiO2:
Adsorption of MB on the adsorbents was studied for 24 hrs with 15ppm initial dye concentration. Effect of water content,
ethanol content, Urea and Montmorillonite K10 concentration during synthesis on adsorption of MB was also studied.
3.3 Effect of ethanol content on adsorption of MB:
The influence of ethanol content during synthesis on the adsorption capacity and % removal is presented in Fig. 2. Figure shows
that the % removal and adsorption capacity of the adsorbent are influenced by the amount of ethanol used during synthesis.
2
100
60
95.53
% Removal
95
93.83
92.33
91.5
50
40
90
85
80
82.5
13.85
12.375
14.75
13.725
14.675
75
30
% Removal
20
Ads.Capacity
10
0
20
30
40
50
60
Ethanol Content (ml)
Figure 2: Effect of ethanol content on % removal & adsorption capacity
4. Conclusions:
From this study it was concluded that MMT K10 supported N doped TiO2 shows maximum % removal as 95.53% and
adsorption capacity as 14.75 mg/gm . Optimization of other conditions of synthesis was also carried out on the basis of
adsorption capacity and % removal of the adsorbent for MB dye.
References:
1.Ruchi Srivastava, D C Rupainwar., Indian Journal of Chemical Technology,18, 67-75, (2011).
2. Olugbenga Solomon Bello, Isah Adewale., J. Chem., 66, 117–129, (2013).
3.A. Selvaraj, R. Parimiladevi, K. B. Rajesh., J. Environ. J. Nanotechnol. 2, 35-41, (2013).
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